Different source said it is at88 series chip which I'm not sure about. Because the large connection areas on one side of the circuit connect to pins 8, 5, 6 , 4. Which all happen to be EEPROM's 8-Vcc, 5-SDA, 6-SCL and 4-Ground.
For a at88 chips 8-Vcc, 5-NC, 6-SCL, 4-NC, which doesn't make much sense.

The the circuit is from Samsung SCX 4500 printer's toner(ML-1630).
Small text on the chip is: SS02-1 0822 (if it's any help).

Last point, I'm using RS-232 to USB, that shouldn't be an issue right.